Being Kim Kardashian's assistant is a bum job but someone has to do it....

Two lucky ass-istants are seen smothering sand on the reality TV star's famous bottom during a sexy photoshoot in Thailand as seen on the latest episode of her show Keeping Up With The Kardashians.

But don't expect the two men to be giving up their jobs anytime soon as they looked like they were getting a lot of job satisfaction during the shoot.

And in the world of celebrity, you can get assistants to do pretty much any job.

From being Mariah Carey's drinks holder, feeding Lena Dunham her lunch and carrying Lady Gaga, we round up the best – and worst – jobs in showbiz....

Mariah Carey

(Photo: WireImage)

We wonder if this woman had any previous experience when she applied to be a drinks holder for Mariah Carey?

Back in 2008, the diva's then vocal coaches, David and Carrie Grant, who judged on Fame Academy, claimed the 44-year-old hired someone just to hold her drink and straw.

Carrie said: “There was a woman that held her drink with a straw. That's all she does, flies around the world as a drinks holder.”

David added: “It's like old monarchs had food tasters. She has a drinks holder so she doesn't smudge her lipstick.”

Rihanna

(Photo: Getty)

Earlier this year, one of Rihanna's assistants was tasked with pouring bottled water down her naked back and bottom for a racy photo shoot in just a white crop top.

Many men would pay to be this up close and personal to the sexy 26-year-old singer but this fella isn't even smiling. Perhaps it's just another day, another dollar to him.

Eva Longoria

With such a long and heavy train, it's no wonder actress Eva Longoria's dress needed its own personal assistant.

Despite wearing her own tight fitting dress and heels, the female assistant managed to keep her composure as she adjusted the 39-year-old Desperate Housewives star's gown on the red carpet at the Cannes Film Festival back in 2012.

We're dying to know whether the assistant lists 'dress holding' as a skill on her CV.